Bass - zoom b3n - alto ts212
Would that work? I know you can't play a bass through a guitar amp and cab, can you play it through those frfr speakers and will if sound okay?
Yes, the Alto TS212 would amplify the signal from the B3n.
Whether or not it would be usable in a live band situation or for your needs is the question.
Once you have a B3n in your possession, and along with your bass, I highly recommend a trip down to Guitar Center where you would be able to connect it to a TS212 there for a free, in-person audition and then make a determination.